Multilingual Speech Recognition and Synthesis API

API ID 13291

Effortlessly recognize and synthesize speech in multiple languages with our advanced multilingual API.

API Documentation

Endpoints

Request
Synthesizes input text in 70 global languages into high-fidelity 24kHz WAV audio using Gemini Neural Voices or ChatGPT HD Voices.
Endpoint ID: 27504
POST https://tracker.zylalabs.com/api/13291/multilingual+speech+recognition+and+synthesis+api/27504/text+to+speech+tts+-+multilingual+synthesis
INPUT PARAMETERS

Text To Speech TTS - Multilingual Synthesis — Endpoint Features

Object Description
Request Body Required Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

API EXAMPLE RESPONSE
JSON
{
    "audio": "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...",
    "mimeType": "audio/wav",
    "chunksSynthesized": 1,
    "_note": "Response truncated for documentation purposes"
}
Text To Speech TTS - Multilingual Synthesis — CODE SNIPPETS

curl --location --request POST 'https://zylalabs.com/api/13291/multilingual+speech+recognition+and+synthesis+api/27504/text+to+speech+tts+-+multilingual+synthesis' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{"text": "Hello world from Zyla Labs", "provider": "gemini", "voiceName": "en-US-Journey-F"}'

    
Request
Transcribes uploaded audio files in 70 languages into verbatim text with high accuracy.
Endpoint ID: 27505
POST https://tracker.zylalabs.com/api/13291/multilingual+speech+recognition+and+synthesis+api/27505/speech+to+text+stt+-+multilingual+audio+transcription
INPUT PARAMETERS

Speech To Text STT - Multilingual Audio Transcription — Endpoint Features

Object Description
Request Body Required Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

API EXAMPLE RESPONSE
JSON
{
    "text": "Xin lỗi, bạn chưa đính kèm file âm thanh nào vào yêu cầu. Vui lòng tải file âm thanh lên hoặc cung cấp đường dẫn (link) để tôi có thể hỗ trợ bạn chuyển đổi thành văn bản.",
    "provider": "Google Gemini",
    "model": "gemini-3.1-flash-lite",
    "durationSecs": 1,
    "chunksProcessed": 1
}
Speech To Text STT - Multilingual Audio Transcription — CODE SNIPPETS

curl --location --request POST 'https://zylalabs.com/api/13291/multilingual+speech+recognition+and+synthesis+api/27505/speech+to+text+stt+-+multilingual+audio+transcription' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{
    "audioBase64": "UklGRiQAAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQAAAAA=",
    "mimeType": "audio/wav",
    "lang": "vi"
  }'

    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Multilingual Speech Recognition and Synthesis API simply include your bearer token in the Authorization header.

Headers
Header Description
Authorization Required Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

No long-term commitment. Upgrade, downgrade, or cancel anytime. Free Trial includes up to 50 requests.

🚀 Enterprise Plan

Starts at
$ 10,000/Year


  • Custom Volume
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  • Real-Time API Monitoring

Overview

High-fidelity 24kHz Neural Text-to-Speech TTS and 99.8 percent accurate Speech-to-Text STT API supporting 70 global languages including Vietnamese, English, Japanese, Korean, Chinese, French, German, Spanish. Powered by Google Gemini and OpenAI ChatGPT.

Multilingual Speech Recognition and Synthesis API FAQs

The Text to Speech (TTS) endpoint returns high-fidelity WAV audio files synthesized from input text, while the Speech to Text (STT) endpoint returns verbatim transcriptions of uploaded audio files in text format.

For TTS, the key field is "audio," which contains the audio data. For STT, key fields include "text" (the transcribed text), "provider" (the service used), "model" (the specific model employed), "durationSecs" (length of audio), and "chunksProcessed" (number of audio segments processed).

The TTS endpoint accepts parameters such as "text" (the input text), "language" (the desired language for synthesis), and "voice" (the specific voice model). The STT endpoint accepts parameters like "audioFile" (the audio to be transcribed) and "language" (the language of the audio).

The TTS response contains a single field "audio" with the synthesized audio data. The STT response is structured with multiple fields: "text" for the transcription, "provider" for the service used, "model" for the transcription model, "durationSecs" for audio length, and "chunksProcessed" for the number of processed segments.

The TTS and STT functionalities are powered by advanced technologies from Google Gemini and OpenAI ChatGPT, ensuring high-quality audio synthesis and transcription accuracy.

Typical use cases include creating voiceovers for videos using TTS, generating audiobooks, and transcribing meetings or interviews with STT for documentation and accessibility.

Users can play the audio returned by the TTS endpoint directly in applications or save it as a file. For STT, the transcribed text can be used for documentation, analysis, or further processing in applications like chatbots or content creation.

Data accuracy is maintained through the use of advanced neural models from Google and OpenAI, which are continuously trained and updated to improve performance and adapt to various languages and accents.

General FAQs

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